Handle for pneumatic tools.



170.787,70. PATE-MED APR.18,19 05..

` `J. H. TEMPLIN.

HANDLE POR PNEUMATIC TOOLS. APPL'IOATION FILED rm. 2a. 1904.

UNITED STATES Patented April 18, 1905.

PATENT Oriucif..I

JOSEPH H. TEMPLIN, OF NEV YORK, N. Y., ASSIGNOR TO PHILADELPHIA PNEUMATIO TOOL COMPANY, A CORPORATION OF NEW JERSEY.

HANDLE FOR PNEUMATIC TOOLS.

SPECIFICATION forming part of Letters -Patent No. 787,705, dated April 18, 1905.

Application filed February 23, 1904:. Serial No. 194,709-

To @ZZ whmn it may concern,.-

Be it known that I, JOSEPH H. TEMPLIN, a citizen of the United States of America, and a resident of the borough of Brooklyn, New York city, and State of New York, have invented certain new and useful Improvements in Handles for Pneumatic Tools, of Which the following is a specification.

My invention relates to improvements of the character described in my pending application, Serial N o. 174,160, filed September 22, 1903, in handles for pneumatic tools used for chipping, riveting', and the like purposes; and the essential object is to provide independent inlet and exhaust passages for the control of the admission valve in a Way to simplify the construction with improved facility for varying the operation of the tool, as hereinafter described, reference being made to the accompanying drawings, in which- Figure l is a vertical section of my improved handle with the hammer to be operated and its controlling-valve added for more fully illustrating the uses of the handle, but not as being part of the invention to be claimed. Fig. 2 is another vertical section, showing the admission-valve differently located in the handle. Fig. 3 is a detail in section on line .fr of Fig. l. Fig. 4 is a vertical section showing a modification of the restricted passage in the stock of the handle for the air-pressure.

A represents the stock of the handle. It has a socket L at one end for suitable connection with the chipping, riveting, or other tool to be operated and through which the air is to be supplied to the tool by a passage a, and on the other end is a hand-gripping piece c, and it contains a balanced piston admission 0r throttle valve CZ intermediately of said ends for controlling air or other fluid, which is received from any suitable source through a conductor e and enters the valve-chamber f through a passage g. A spring /L is employed in connection with said valve adapted for constantly tending to close it. Although a lever is commonly employed in connection with the valve for opening it against the force of the spring, the lever being worked by the thumb of the hand grasping the handle, the

strain on the thumb is very tiresome, because 5o the spring is of necessity somewhat powerful to insure prompt action of the valve in closing, particularly when resisted by dirt, which is sometimes the case. I therefore provide for the application of air-pressure in lieu of 55 the thumb-lever for opening the admissionvalv'e in the followingmanner: I make the admission valve with part d slightly flattened, grooved, or otherwise provided with a small restricted passage 2 along it (see Fig; 6o 3) and communicating with the-space at 4, Where pressure takes effect to open the valve, With a small passage 8 in the valve-bushing 9 from main inlet-passage g communicating with passage Q'and also providing the exhaust- 6 5 passage 3 from space 4 in suitable proximity to the handle c for being controlled by the thumb or hand of the operator grasping said handle. l y

In operation air admitted through main 7o' passage g will not enter through passage a to the machine to be operated, being shut olf therefrom by the valve d standing as shown in the drawings, and aconstant but restricted volume will escape through passages 8, 2, and 7 5 3 so long as exhaust-passage 3 remains open; but when the operator closes the mouth of passage 3 by his finger the air backs up against the end of part d of the valve at 4 and shifts it over against spring 7L and opens 8o communication through t to the hammer apparatus, and thereby sets it in operation and continues such operation so long as the operator controls the exhaust 3. I/Vhen such control ceases, spring t shifts the valve back 8 5 again and stops the machine. It Will be seen that by partly closing the exhaust the operation of the machine may be varied bythe opening of the valve more or less.

By this plan of construction simply grind- 9o ing ofi1 one side of part cl' of the admissionvalve or slightly reducing it in size or boring passage 2 as in Fig. 4 and mak-ing passage 8 in the bushing 9, which may be more easily made and gaged exactly to size in these parts than in the stock of the handle, provides the restricted inlet and free exhaust for opening the admission-valve Without any valve or Special controlling device to the inlet, and thus l and for graduating its closing, and means conmaterially simplifies and cheapens the construction and operation of the apparatus.

A stop-valve Will be provided in the conductor e to shut off the air and prevent Waste While the machine is not in operation.

In Fig. l I represent the essential parts of the chipping, riveting, or other tool to be operated, connected with tle handle which is the subject of my invention attached, and consisting of the cylinder 5, containing the reciprocating hammer 6 and valve 7 and parts and passages controlling the valve and hammer to illustrate the application of the handle; but these constitute no part of the invention claimed and are not, therefore, definitely described.

It will be apparent that the precise construction or type of the throttle-valve Z may be varied according to requirements and that v the same may be located Within the grasping part ofthe handle, as seen in Fig. 2, while in Fig. l I have shown the valve Z as located wholly outside not only the handle, but particularly outside of its grasping portion. It Will be apparent that still further changes may be made by those skilled in the art which may come Within the scope of my invention, and I do not, therefore, desire to be limited in every instance to the exact construction herein shown and described.

What I claim as my invention isl. The combination with the admissionvalve of a pneumatic handle of chipping, riveting and other machines, of Huid-pressure means for opening said valve, holding it open stantly tending to close said valve against said opening means, said opening, holding and graduating means consisting of a restricted air-supply admitted through a part of the admission-valve and a normally open exhaust therefor adapted to be throttled by the thumb or hand of the operator.

2. The combination With the admissionvalve of a pneumatic handle of chipping, riveting and other machines, of fluid-pressure means for opening said valve, holding it open and for graduating its closing, and means constantly tending to close said valve against said opening means, the supply and exhaust passages of said opening means being independ-V ent of each other and the eXh aust-passage being adapted to be throttled by the thumb or hand of the operator.

3. In a pneumatic tool-handlea throttlevalve located wholly outside of the grasping rg part of said handle, iiuid-pressure means for opening said valve, and means constantly tending to close said valve against said opening means, the supply and exhaust passages of said opening means being independent oi' each other and the exhaust-passage being adapted to be throttled by the thumb or hand of the operator.

Signed at New York this 19th day of February, 1904.

JOSEPH H. TEMPLIN.

Witnesses:

HENRY E. LEGENDRE, A. P. THAYER. 

